I towed my Dodge 1500 four down.
I towed all my Jeeps 4 down, including the current one I just got.
However, our PT Cruiser Turbo convertible can not be towed four down, so when we made a trip from here to Ringold, GA and back a couple years ago, I towed it on a dolly. We encountered none of the dreaded problems that some delight in telling about when using a dolly. All the campgrounds we stopped at (mostly KOA) had pull-through sites, except one. I had to unload the car, disconnect the dolly, and back in to the site. Oh, no, it took me 15 minutes! Then, in the morning, I had to pull out of the site, hook up the dolly, and load the car. ANOTHER 15 minutes gone! I tell ya, that half an hour just RUINED our schedule! (Not.)
By the way, the weather was great the whole trip. No problems with rain or cold.
IMO, it is what you make of it. If you decide that you can do this, a dolly will be no problem. If you are the type to P*** and moan about every little thing, neither method will be satisfactory.
Good luck.